Fluidlexikon

Hydraulic capacity C h

Refers to the compliance of system elements (compressibility of the oil, elasticity of the pipe, spring effect of a hydraulic accumulator):

hydraulischekapazitaet_c___h_01.gif

The hydraulic capacity should be kept as low as possible in the interest of having a stiff drive. This can be achieved by having a low dead volume V o between control and actuator. The hydraulic capacity for cylinder drives is dependent on the piston position (Figure H 18). In the event of pressure reductions, an

increase in C h may have a beneficial effect on dynamic performance.

0001_hydraulischekapazitaet_c___h

Figure H 18: Hydraulic capacity of a cylinder based on the stroke